EP 0780031 A1 19970625 - CIRCUIT FOR OPERATING AN ELECTRIC MOTOR
Title (en)
CIRCUIT FOR OPERATING AN ELECTRIC MOTOR
Title (de)
SCHALTUNG ZUM BETREIBEN EINES ELEKTROMOTORS
Title (fr)
CIRCUIT PERMETTANT DE FAIRE FONCTIONNER UN MOTEUR ELECTRIQUE
Publication
Application
Priority
- DE 9501084 W 19950817
- DE 4432059 A 19940909
Abstract (en)
[origin: DE4432059A1] The proposal is for circuits for operating an electric motor (11) containing a monitoring device (25) for detecting overloads in the electric motor (11). In a first embodiment, the monitoring device (25) compares the motor voltage (UM) with a predetermined motor voltage limit and, if the motor voltage (UM) drops below it, issues an overload signal (26). In another embodiment, the monitoring device compares the motor current (IM) with a predetermined motor current limit and issues an overload signal (26) if said limit is exceeded, the motor current limit being dependent on the motor voltage (UM). The circuits of the invention for operating an electric motor (11) are suitable for use in a ventilator system, the fan (23) of which cools the electric motor (11) and/or a final stage (18).
IPC 1-7
IPC 8 full level
H02H 7/085 (2006.01); H02H 7/08 (2006.01); H02P 3/06 (2006.01); H02H 3/00 (2006.01); H02H 3/06 (2006.01)
CPC (source: EP US)
H02H 7/0833 (2013.01 - EP US); H02H 3/006 (2013.01 - EP US); H02H 3/06 (2013.01 - EP US); H02H 7/0858 (2013.01 - EP US)
Citation (search report)
See references of WO 9608065A1
Designated contracting state (EPC)
DE ES FR GB IT
DOCDB simple family (publication)
DE 4432059 A1 19960314; DE 59504162 D1 19981210; EP 0780031 A1 19970625; EP 0780031 B1 19981104; ES 2124579 T3 19990201; JP H10505216 A 19980519; US 5877604 A 19990302; WO 9608065 A1 19960314
DOCDB simple family (application)
DE 4432059 A 19940909; DE 59504162 T 19950817; DE 9501084 W 19950817; EP 95928947 A 19950817; ES 95928947 T 19950817; JP 50909196 A 19950817; US 80905497 A 19970310